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Naturalised status of exotic conifers in New Zealand
New Zealand Journal of Botany ( IF 0.8 ) Pub Date : 2019-07-03 , DOI: 10.1080/0028825x.2019.1626744
Clayson J. Howell 1
Affiliation  

This paper provides an assessment of the naturalisation status all exotic conifers present in New Zealand using existing herbarium specimens as qualifiers. A total; of 371 exotic taxa are confirmed as having been introduced for cultivation which represents 63% of world conifers that are non-native to New Zealand. In strong contrast to indigenous conifers, introduced conifers are predominantly from the Pineaceae and Cupressaceae families. Naturalised conifers are a major issue for southern hemisphere countries, this paper confirms a total of 57 exotic conifer taxa as wild in New Zealand, including 15 new taxa described as wild since the last comprehensive update. Conifers from the Rocky Mountain and Eastern Asiatic Botanical Regions are prominent among introduced taxa, but naturalised taxa frequently originate from Madrean and Circumboreal Regions. Many of the taxa previously reported as wild have expanded their New Zealand range considerably since their distributions were last described. Despite these increases, most exotic conifers in New Zealand likely occupy a relatively small proportion of the area in which they could establish. The ongoing naturalisation and spread of exotic conifers illustrate the significant environmental weed threat posed by this group.



中文翻译:

新西兰外来针叶树的归化状况

本文使用现有的标本室标本作为定性指标,评估了新西兰境内所有外来针叶树的归化状况。一共 371个外来生物分类中的70个被确认已引入种植,占世界上非新西兰本土针叶树的63%。与本土针叶树形成鲜明对比的是,引入的针叶树主要来自松科和柏科。天然针叶树是南半球国家的一个主要问题,本文确认了新西兰共有57种野生针叶树分类单元,其中包括自上次全面更新以来被描述为野生的15种新分类单元。来自落基山和东亚植物区的针叶树在引进的分类单元中很突出,但是归化的分类单元通常来自马德雷和周边地区。自上次描述其分布以来,许多以前被报告为野生的分类单元已经大大扩展了其新西兰范围。尽管增加了这些数量,但新西兰大多数外来针叶树仍可能占据其可以建立的面积的较小比例。外来针叶树的不断归化和传播说明了该群体对环境杂草的重大威胁。

更新日期:2019-07-03
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